American Ginseng Root contains various kinds of ginsenosides, such as ginsenoside Ro, Rb1, Rb2, Rc, Rd, Re, Rg1 and pseudoginsenoside F11. F11 is the main difference to distinguish American ginseng from ginseng. Furthermore, American ginseng also contains 18 kinds of amino acids including arginine and aspartate. American Ginseng Root Powder improves and enhances the memory. American Ginseng Root Powder was found in animal tests that ginsenoside(500 or 100mg.Kg+,PO x Td) functioned against the deteriorated memory, which had been caused by M-choline blockage, suggesting its cholin-like effects. Meanwhile, ginsenosides may significantly improve the consolidated memory (long-term damaged memory) induced by lgc.